Circadian Regulation and Diurnal Variation in Gas Exchange

Circadian Regulation and Diurnal Variation in Gas Exchange.

Dear Sir, The uptake of carbon dioxide through the stomata inexorably leads to transpirational water losses, and evolutionary theories hold that plants balance this trade-off by optimizing carbon gain per unit water lost. However, the physiological mechanisms underpinning optimal stomatal regulation remain to be elucidated. In particular, a key assumption is that assimilation and stomatal condu...

Does circadian regulation lead to optimal gas exchange regulation?

Diurnal Variation in Gas Exchange: The Balance between Carbon Fixation and Water Loss1[OPEN]

Stomatal control of transpiration is critical for maintaining important processes, such as plant water status, leaf temperature, as well as permitting sufficient CO2 diffusion into the leaf to maintain photosynthetic rates (A). Stomatal conductance often closely correlates with A and is thought to control the balance between water loss and carbon gain. It has been suggested that a mesophyll-dri...

Diurnal Variation in Gas Exchange: The Balance between Carbon Fixation and Water Loss.

Stomatal control of transpiration is critical for maintaining important processes, such as plant water status, leaf temperature, as well as permitting sufficient CO2 diffusion into the leaf to maintain photosynthetic rates (A). Stomatal conductance often closely correlates with A and is thought to control the balance between water loss and carbon gain. It has been suggested that a mesophyll-dri...

Diurnal variation in the nitrate content of parsley foliage

The diurnal fluctuation of nitrate concentration in the foliage of three parsley subspecies (plain-leafed, curly-leafed and turnip rooted parsley) cultivated in the spring and autumn of two consecutive years was examined. Nitrogen was applied at 30 (Control), 75, 150, 300 mg kg-1 in both years, but with the addition of 450 mg kg-1 in year 2. Harvest was carried out at 08:30, 12:30 and 17:30 on ...